CBSE

Hello, Yes definitely you have very good rank in JEE Mains through which you can easily get any government college. I would suggest try once for NITs as well.

Yes you can, try to apply for the NITs and also for the Spans might be that you can get a good SPA in the last round of the counselling.

Yes, you can get admission for BBA.

It would be better if you have shared your location as well. These days many colleges government or private are offering quality education. You can apply with Delhi university for B.Sc. As it is a central university, is known for it quality As online forms will be out in june. And you can also join te government college at your native place. All the best.

Hello,
Yes, you can apply for B.Sc.

You have to register your self for JOSSA counselling. https://www.shiksha.com/exams/josaa/counselling.

You can use the below link to know the expected college you may get:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Hello,
You can apply for NMI (Narsee Monji Institute) for B.Com in Economics Honors!

Yes, you could easily get admission in any of the college you want just apply for the admission procedure and provide them the required documents and details. All the best for your future.